Althoughthecausesofcancerwedon

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Although the causes of cancer ____we do not yet have any practical way to prevent it.

A．are being uncovered	B．have been uncovering
C．are uncovering	D．have uncovered

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In __________ film Cast Away. Tom Hanks plays __________ man named Chuck Noland.

A．a; the

B．the; a

C．the; the

D．a; a

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_________ walk is expected to last all day, so bring __________ packed lunch.

A．A; a

B．The; 不填

C．The; a

D．A; 不填

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—Could you tell me the way to __________ Johnsons, please?
—Sorry, we don’t have __________ Johnson here in the village.

A．the; the

B．the; a

C．不填; the

D．the; 不填

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)Many people have come to realize that they should go on __________ balanced diet and make __________ room in their day for exercise.

A．a; 不填

B．the; a

C．the; the

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We have every reason to believe that __________ 2008 Beijing Olympic Games will be __________ success.

A．不填; a

B．the; 不填

C．the; a

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